JPH0243582Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a support structure for a laser processing head in a so-called multi-tasking machine in which a laser processing head and a machining head such as a punching head are provided on the same frame. .

[Conventional technology]

In the multi-tasking machine as described above, vibrations during processing by the machining head are transmitted to the laser processing head, which may cause misalignment of the optical axis due to misalignment of lenses and mirrors within the processing head.

By the way, unlike a laser oscillator, the area of the optical system in contact with the frame is not large, and it is not as susceptible to vibrations as the laser oscillator, so conventionally it was fixed integrally with the laser oscillator. Furthermore, vibration isolation for the laser processing head was also attempted by means of a vibration isolation means interposed between the laser oscillator and the frame.

[Problem that the invention attempts to solve]

Therefore, the present invention is intended to provide a support structure that can effectively isolate the optical system portion of the laser processing head in the multitasking machine from vibrations transmitted through the frame.

[Means for solving problems]

The support structure for the laser processing head proposed by this invention supports the optical system part of the laser processing head so that it can move up and down with respect to the frame, and has a spring that biases it downward and a fluid cylinder that biases it upward. The structure is such that the optical system part is supported at the processing position by the expansion and contraction of the fluid pressure cylinder.

〔Example〕

Hereinafter, embodiments will be described based on the drawings.

5 and 6 are an overall plan view and a side view of a multi-tasking machine equipped with a laser processing head 1 and a punch processing head 2 according to this embodiment, respectively, and the side view is C.
A material plate W is supported movably within one plane below the two processing heads 1 and 2 provided at the upper front end of the letter-shaped frame, and an arbitrary position of the plate is moved to the position of the processing heads 1 and 2. Mobile table device 3
is provided.

4 is a work holder made of a plate material, and 5 is a carriage on which the work holder 4 is mounted.

Further, in this embodiment, the laser oscillator 6, the NC device 7, the overall control device 8, etc. are all mounted on the same frame.

The laser oscillator 6 and the laser processing head 1 will be explained below.

That is, the laser oscillator 6 is supported at four locations on the frame F as shown in the first and second figures, and the laser beam emitted into the guide tube 9 extending horizontally forward is transmitted through the guide tube 9 provided at the front end. The rear plate material W is refracted downward at a right angle by the mirror 11, passes through the vertical guide tube 12, and is condensed by the lens 13.
The support structure at four points between the laser oscillator 6 and the frame F is as follows.

That is, four shafts 14 are vertically protruded from the bottom surface of the laser oscillator 6, and the shafts 14 are inserted into linear bearings 15 provided on the frame F to be supported in a vertically movable manner. The base end flange portion 14a of the shaft 14 and the upper end surface 15 of the linear bearing 15 are
a and are machined into accurate planes, and both are 14
When a and 15a are in close contact with each other, the laser oscillator 6 assumes an accurate horizontal attitude.

Further, on the side of the shaft 14, there is an air spring 16 that expands and contracts by supplying and discharging air between the bottom surface of the laser oscillator 6 and the frame F, and a flange portion 1 at the end of a rod 17a extending through the frame F.
A fluid cylinder 17 is provided forming a 7b;
When the fluid cylinder 17 is extended and compressed air is supplied to the air spring 16 from an air source (not shown), the air spring 16 is extended and elastically lifts the laser oscillator 6, and the flange portion 14
a is separated from the linear bearing upper end surface 15a, air is exhausted from the air spring 16 to shorten the air spring 16, and the fluid cylinder 17 is
When contracted, the flange portion 17b strongly engages with the lower surface of the frame F, thereby fixing the laser oscillator 6 at a fixed position relative to the frame F.

Furthermore, when the laser oscillator 6 is elastically supported on the frame F, most of the vibrations transmitted from the punching head 2 to the frame F are in the vertical direction, and the horizontal component is a few hundredths. Since it is in millimeters, the horizontal component is absorbed by the play that originally exists between the shaft 14 and the linear bearing 15.

Next, the laser processing head 1 will be explained. The processing head 1 includes the above-mentioned vertical guide tube 12, an optical system part of a focusing device 18 that holds the lens 13 at the lower end of the guide tube 12, and the focusing device 1.
8, a vertical support device 19 that supports the entire optical system including the guide tube 12 and the front part of the horizontal guide tube 9 in a vertically movable manner; A support frame 22 that is fixedly connected 21, a guide shaft 23 that vertically passes through a sleeve portion 22a projecting laterally from the support frame 22, and a guide shaft 23 that is interposed at the upper end of the guide shaft 23 and that extends loosely downward from the support frame 22. Spring 24 for urging
and a block portion 2 protruding from the back side of the support frame 22.
2b and an air cylinder 25 for lifting the support frame, the end of which is connected to the rod 25a. The upward force exerted by the air cylinder 25 is balanced so that the guide tubes 9 and 12 and the focusing device 18 (that is, the optical system part) can be elastically supported in space.

A bracket 26 fixes the guide shaft 23 to the frame F, and the main body of the air cylinder 25 is fixed to the back surface of the bracket 26.

Reference numeral 27 denotes a vertically elongated hole bored in the back plate of the bracket 26, through which the block portion 22b protrudes rearward, and the lower surface of the block portion 22b and the elongated hole 27 The bottom part is machined into a precise abutment surface, and when the air cylinder 25 contracts, the two abutment surfaces separate and the guide tubes 9 and 12 and the focusing device 18
are elastically supported in space as described above, but when the air cylinder 25 is extended, the two contact surfaces come into close contact with each other (FIG. 3) and the guide tubes 9, 1
2 and the focusing device 18 can be positioned at fixed positions with respect to the frame F.

Furthermore, in this embodiment, the air cylinder 25
A precision pressure reducing valve is interposed in the air supply circuit to the spring 2.
4 and the pressure change in the vertical direction of the air cylinder 25, it acts to cancel out the pressure change in the vertical direction of the air cylinder 25, and prevents vibration from being transmitted to the guide tubes 9, 12 and the focusing device 18 (optical system part). It is planned.

The lens 13 in the focusing device 18 of this embodiment is attached as follows.

That is, as shown in FIG. 4, a large diameter screw hole 32 is formed on a block 31 to which the nozzle 28 and nozzle holder 29 at the lowermost end of the processing head 1 are fixed in an adjustable manner, and a lens is inserted into the screw hole 32. The lens holder 33 into which the nozzle 13 is fitted is screwed on, and when cleaning or checking the lens 13, there is no need to remove the nozzle 28 or the nozzle holder 29. This can be done by simply attaching and detaching it.

34 is an assist gas introduction hole bored in the flange of the nozzle holder 29;
is opened obliquely upward toward the surface of the lens 13, and when gas is introduced, the gas once enters the lens 13.
The lens 13 is cooled by hitting the surface, and then it is sprayed downward from the nozzle 28 onto the surface of the plate material W.

Further, numeral 35 is a plate that contacts the surface of the plate material W, which is connected to the block 31 by a shaft 36 and a bearing 37 so as to be able to move up and down, and 38 is a ball that comes in rolling contact with the surface of the plate material.

The multi-tasking machine of this embodiment has the above structure, and when processing a plate material W using the punching head 2, the cylinder 17 of the laser oscillator 6 is extended, and the air spring 16 is For the laser processing head 1, the cylinder 25 is contracted from the state shown in the third figure, and the upward biasing force of the cylinder 25 causes the guide cylinder 9, 12 and the focusing device 18 are likewise elastically supported on the frame F, so that punch vibrations transmitted along the frame F are not transmitted to the laser optics.

When performing laser processing, the cylinder 17 of the laser oscillator 6 is contracted, and the air spring 16 is also contracted to cause the flange portion 14a of the shaft to come into contact with the upper end surface 15a of the bearing. For laser processing head 1,
By extending the cylinder 25, the block portion 2
2b and the bottom of the elongated hole 27, it is also fixed at an accurate position relative to the frame F.

Therefore, since the optical system including the laser oscillator 6 is now accurately positioned with respect to the frame F, the plate material W on the table device 3 can be accurately processed.

[Effect of idea]

As is clear from the above explanation, by using the support structure according to this invention, the laser processing head can be well isolated from vibrations from the machining head, and the positional deviation of mirrors, lenses, etc. in the processing head can be prevented. The laser beam axis does not go awry. Moreover,
When laser processing is performed, the laser processing head can be accurately positioned and fixed on the frame by effectively utilizing the fluid cylinder for vibration absorption.

Therefore, more accurate processing can be performed.

[Brief explanation of drawings]

Figure 1 is a plan view of the laser processing head including the laser oscillator, Figure 2 is a sectional view taken along the - line in Figure 1, Figure 3 is a side view of the laser processing head, and Figure 4 is a side view of the laser processing head.
This figure is a longitudinal sectional side view of the lower end of the processing head, FIG. 5 is a plan view of the entire multifunctional processing machine equipped with the laser processing head, and FIG. 6 is a side view of the same. 1... Laser processing head, 2... Punch processing head, 9, 12... Guide tube, 13... Lens,
18... Focusing device, 19... Vertical support device, 22... Support frame, 22a... Sleeve portion, 2
3... Guide shaft, 24... Spring, 25
...Air cylinder, F...Frame.

Claims (1)

[Scope of utility model registration request] In a multi-tasking machine equipped with a laser processing head and a machining head such as a punching head, an optical system part of the laser processing head is supported vertically movably with respect to a frame, and the optical system part is biased downward. The spring and the upwardly biased fluid cylinder are balanced and supported,
A support structure for a laser processing head in a multi-tasking machine, characterized in that the optical system portion is fixed at a processing position by expansion and contraction of the fluid cylinder.